feat(t237): import freight orders synchronously

backend-api/internal/transport/httpapi/admin_handlers.go

@@ -852,6 +852,8 @@ func writeUsecaseError(ctx *gin.Context, err error) {
 		status = http.StatusBadGateway
 	case "OCR_SERVICE_INVALID", "ERP_UNAVAILABLE":
 		status = http.StatusServiceUnavailable
+	case "FREIGHT_SYNC_TIMEOUT":
+		status = http.StatusGatewayTimeout
 	}
 	message := typed.Message
 	if preflightMessage, ok := freightPreflightPublicMessage(typed.Code); ok {
@@ -883,6 +885,10 @@ func freightPreflightPublicMessage(code string) (string, bool) {
 		return "OCR service is invalid", true
 	case "ERP_UNAVAILABLE":
 		return "ERP is temporarily unavailable", true
+	case "FREIGHT_SYNC_TIMEOUT":
+		return "freight order sync exceeded 55 seconds", true
+	case "FREIGHT_SYNC_BUSY":
+		return "another freight order sync is already running", true
 	default:
 		return "", false
 	}